1. Rc5+ Ka6 2. Nb8+! Rxb8 3. Ra5+! 3. axb8=Q? Nd4+! 4. Kd3 Qxb8 = 3... Kxa5 3... Qxa5 4. axb8=Q Qa4+ 5. Kd2 +- 4. Nc6+ 4. axb8=Q?? Nd4+! 5. Kd3 Qxb8 -+ 4... Ka4 4... Ka6 5. axb8=N+! +- (5. axb8=Q? Nd4+! 6. Kc3 Nxc6 =) 5. axb8=Q Nd4+!
6. Nxd4!! Qxb8 6... Qxd4 7. Qb3+! Ka5 8. Qc3+! +- 7. b3+ Ka3 7... Ka5 8. Nc6+ +- 8. Kb1! Qg3 8... Kb4 9. Nc6+ +- 9. Nc2#
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1. Qf6! 1. Qf8? Ka2! 2. Qf7 Re7! = 1... Ka2 2. Kc2 Rb4 3. Rxa5 Rc4+! 4. Nxc4 Qxa5! 4... Qb1+ 5. Kd2 Qc2+! 6. Ke1! +- (6. Kxc2? stalemate)
5. Qa1+!! 5. Qf2? Qe1! = (5... Qb4? 6. Kc1+ Ka1 7. Qd4+ Ka2 8. Qd2+! Qxd2+ 9. Nxd2 +-) 5... Kxa1 6. Nxa5 a2 7. Nb3#
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1. Ng3! 1. Nxg6+? Ke6+! 2. Kxh4 Kxf6 = 1... Nf3+ 1... e2 2. Nxe2 Ke6+ 3. Kxh4 Kxf6 4. Rh7 Rh5+ 5. Rxh5 +- Troitzky, EGTB 2. Kxg6 Ke6 3. Ng8! Rg5+!
Thematic try: 4. Kh7? Rxg3 5. Rxg3 e2 6. f7! e1=Q 7. f8=Q Qxg3 8. Qc8+! Kd5 9. Ne7+ Ke4 10. Qc2+ Kf4 11. Nd5+ Kg4 12. Ne3+
12... Kh5! = 12... Kf4? 13. Ng2+ Kg4 14. Qc8+ Kh5 15. Qe8+ Kg4 16. Qe6+ Kh5 17. Qh6+ Kg4 18. Ne3#
Solution: 4. Kh6! Rxg3 5. Rxg3 5. Re7+? Kf5 = 5... e2 6. f7! e1=Q 7. f8=Q Qxg3 8. Qc8+! Kd5 8... Kf7 9. Qd7+ Kf8 10. Qe7+ Kxg8 11. Qe8# model mate 9. Ne7+ Ke4 10. Qc2+ Kf4 11. Nd5+ Kg4 12. Ne3+
12... Kf4 13. Ng2+ Kg4 14. Qc8#
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1. Nf7+ Kd5
Thematic try: 2. b7? Rb4 3. b8=Q (3. e4+ Kxe4! 4. Nxg5+ Kf5! 5. Nxh7 a2 6. b8=Q Rxb8 7. Kxb8 a1=Q -+) 3... Rxb8 4. Kxb8 a2 5. a7 a1=Q 6. a8=Q+ (6. e4+ Kxe4 7. a8=Q+ Qxa8+ -+) 6... Qxa8+ 7. Kxa8 g4 8. Nh6 g3 9. Nf5 g2 -+Solution: 2. e4+! Rxe4 3. b7 Rb4 4. b8=Q Rxb8 5. Kxb8 a2 6. a7 a1=Q 7. a8=Q+ Qxa8+ 8. Kxa8 g4 9. Nh6! g3 10. Nf5 g2
11. Ne3+! =
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1. h7 Qh8 2. Bf8! Ke8 2... Qxf8 3. Rg8 +- 3. Ke4! 3. Kd3? Kxf8! 4. Rc7 b3! = zz 3... Kxf8
4. Rc7!! Thematic try: 4. Rb7? b3 5. Kd3 b2! 6. Kc2 b1=Q+! 7. Kxb1 Qe5! = 4... b3 5. Kd3! zz b2 6. Kc2 b1=Q+ 7. Kxb1 Qe5 8. Rc8+ +-
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1. Kg4+! 1. b6? Bb8! = 1... Qh6 2. b6! Bxb6 3. Qb8+ Bd8! 3... Kh7 4. Rh2 +- 4. Rxd8+ 4. Rh2? Nc6! 5. Rxh6+ gxh6 6. f8=Q+ Nxf8 7. Qb2+ Kh7 8. Qb7+ Ne7 = 4... Kh7 5. Rh8+! Nxh8 6. Qg8+! Nxg8 7. f8=N#
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